The standard outlines two distinct methods of calculating multi-unit residential buildings. Method A or the “Gross Method” produces a larger area since it measures each unit including the full thickness of the exterior wall and the full thickness of walls separating living units from common areas.


Question:

I understand the thickness of the exterior wall and the thickness of interior common walls are included in square footage calculation but the demising wall between the tenants, would only 1/2 the thickness of the wall be calculated for an apartment?

Thank you in advance.